1. What is an appropriate performance target? ʲô�Ǻ��ʵļ�ЧĿ�ꣿ
2. The teacher evaluated the performance of each student. ��ʦ��ÿ��ѧ���ı����������ۡ�
3. And its key performance is the stability of frequency. Ƶ��Դ�Ĺؼ���������Ƶ���ȶ��ԡ�
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n.
1. a dramatic or musical entertainment
2. the act of performing; of doing something successfully; using knowledge as distinguished from merely
3. the act of presenting a play or a piece of music or other entertainment
4. process or manner of functioning or operating
5. any recognized accomplishment